import numpy as np

N    = 0  # number of clouds
u    = 0
eps  = 0
iEps = 0
dEps = 0
idxK = 0
buff_U   = []
buff_Y   = []
buff_Y_R = []
buff_R   = []
buff_EPS = []
buff_ERR = []
buff_Data  = np.array([0, 0])
buff_Theta = np.array([0, 0, 0, 0])